NEUTRON STAR?
... • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather. We will make an announce ...
... • We will be holding an optional observing night this coming Tuesday, Nov. 8th from 7-9 p.m. on the Science Center roof. We'll be looking at Mars, stellar clusters, binary stars, and more... • Because we live in lovely cloudy Boston, we have to prepare for inclement weather. We will make an announce ...
Stars & Galaxies
... professional development ONLY; and may not be used for other purposes, in whole or part, without the expressed written permission of their ESC-TESCCC coordinator for the region handling your subscription. TESCCC grants subscribers the right to edit this multimedia presentation for intra-district pro ...
... professional development ONLY; and may not be used for other purposes, in whole or part, without the expressed written permission of their ESC-TESCCC coordinator for the region handling your subscription. TESCCC grants subscribers the right to edit this multimedia presentation for intra-district pro ...
BLACK HOLES: The Other Side of Infinity
... – The first black hole, Cygnus X-1, was identified using data from the first X-ray satellite, Uhuru, in 1972 – NASA’s Chandra Observatory has found indications of black holes in practically every galaxy that it has studied in detail. ...
... – The first black hole, Cygnus X-1, was identified using data from the first X-ray satellite, Uhuru, in 1972 – NASA’s Chandra Observatory has found indications of black holes in practically every galaxy that it has studied in detail. ...
Active Galaxies and Quasars: the most luminous objects in the
... Optical view of the MW towards the Galactic Centre in in Saggitarius There is currently no quasar in the centre of the Milky Way because there is insufficient gas “fuel” being accreted by its super-massive black holes. But there may be minor flare-ups from time-to-time as as small gas clouds pass cl ...
... Optical view of the MW towards the Galactic Centre in in Saggitarius There is currently no quasar in the centre of the Milky Way because there is insufficient gas “fuel” being accreted by its super-massive black holes. But there may be minor flare-ups from time-to-time as as small gas clouds pass cl ...
Letter to the Editor - Max-Planck
... efficiency, cannot produce more than ∼1039 erg s−1 for a ∼10 M black hole. This is in agreement with our picture for the beamed hard state, where, in a manner similar to that of blazars, the thermal and/or coronal X-ray flux is swamped by the jet emission and no reflection features should be observ ...
... efficiency, cannot produce more than ∼1039 erg s−1 for a ∼10 M black hole. This is in agreement with our picture for the beamed hard state, where, in a manner similar to that of blazars, the thermal and/or coronal X-ray flux is swamped by the jet emission and no reflection features should be observ ...
Supermassive black holes
... “Stellar mass black holes” – left over from the collapse/implosion of a massive star (about 10 solar masses) “Supermassive black holes” – giants that currently sit at the centers of galaxies (range from millions to billions of solar masses) “Intermediate-mass black holes” – suggested by very recent ...
... “Stellar mass black holes” – left over from the collapse/implosion of a massive star (about 10 solar masses) “Supermassive black holes” – giants that currently sit at the centers of galaxies (range from millions to billions of solar masses) “Intermediate-mass black holes” – suggested by very recent ...
Stardeath
... B. It blows off a large fraction of the star's mass. C. It leaves behind a white dwarf of about two solar masses. D. It peaks about a month after the explosion begins. 7. Which of these is NOT true about the Crab Nebula? A. Doppler shift observations show the filaments expanding. B. A pulsar lies in ...
... B. It blows off a large fraction of the star's mass. C. It leaves behind a white dwarf of about two solar masses. D. It peaks about a month after the explosion begins. 7. Which of these is NOT true about the Crab Nebula? A. Doppler shift observations show the filaments expanding. B. A pulsar lies in ...
Discussion Activity #13
... A. Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we see in the Milky Way disk, suggesting that the halo is full of dark matter. B. The orbital speeds of stars far from the galactic center are surprisingly high, suggesting t ...
... A. Theoretical models of galaxy formation suggest that a galaxy cannot form unless it has at least 10 times as much matter as we see in the Milky Way disk, suggesting that the halo is full of dark matter. B. The orbital speeds of stars far from the galactic center are surprisingly high, suggesting t ...
Natasha Wood
... Mentors: Marco Ajello & Masaaki Hayashida How will you be doing the comparisons? An active galactic nucleus (AGN) is a relatively small region of space at the center of a galaxy that is very luminous over all or part of the electromagnetic spectrum1. This radiation is theorized to be a product of ma ...
... Mentors: Marco Ajello & Masaaki Hayashida How will you be doing the comparisons? An active galactic nucleus (AGN) is a relatively small region of space at the center of a galaxy that is very luminous over all or part of the electromagnetic spectrum1. This radiation is theorized to be a product of ma ...
The Mass of the Galaxy - University of California, Berkeley
... In addition to radio maps, you can use HII regions or O&B stars to try to locate spiral arms. The Sun is near the Orion-Cygnus arm, but that is a “recent” occurrence. It’s been around about 18 times. ...
... In addition to radio maps, you can use HII regions or O&B stars to try to locate spiral arms. The Sun is near the Orion-Cygnus arm, but that is a “recent” occurrence. It’s been around about 18 times. ...
Sample Test 22
... 2. The mass of a black hole can be measured using Kepler’s third law. The electric charge of a black hole can also be measured, but is not considered in discussing black holes since they quickly become neutral through accretion. 3. Black holes are thought to spin very rapidly. A spinning black hole ...
... 2. The mass of a black hole can be measured using Kepler’s third law. The electric charge of a black hole can also be measured, but is not considered in discussing black holes since they quickly become neutral through accretion. 3. Black holes are thought to spin very rapidly. A spinning black hole ...
The Nature of γ-ray Source 3EG J2020+4017
... to the main-sequence star but could arise from an accreting compact companion. • 3. 3EG J2020+4017 is a neutron star with an X-ray luminosity similar to that observed from Vela-like to middle-age pulsars • 4. pulsation and further observation=> GLAST ...
... to the main-sequence star but could arise from an accreting compact companion. • 3. 3EG J2020+4017 is a neutron star with an X-ray luminosity similar to that observed from Vela-like to middle-age pulsars • 4. pulsation and further observation=> GLAST ...
The Life Cycles of Stars
... supernova. Neutron stars spin rapidly giving off radio waves. If the radio waves are emitted in pulses (due to the star’s spin), these neutron stars are called pulsars. The core of a massive star that has 8 or more times the mass of our Sun remains massive after the supernova. No nuclear fusion is t ...
... supernova. Neutron stars spin rapidly giving off radio waves. If the radio waves are emitted in pulses (due to the star’s spin), these neutron stars are called pulsars. The core of a massive star that has 8 or more times the mass of our Sun remains massive after the supernova. No nuclear fusion is t ...
Stellar evolution, II
... form heavier atoms would use up more energy than they would produce. The outer layers squeeze down onto the iron core and the star explodes as a Type II supernova. ...
... form heavier atoms would use up more energy than they would produce. The outer layers squeeze down onto the iron core and the star explodes as a Type II supernova. ...
Measuring the Masses of Neutron Stars
... The compact remnants of massive stars A neutron star is the compact remnant of a massive star (M ≥ 8 MA) with a central density that can be as high as 5 to 10 times the density of an atomic nucleus. Neutron stars can be detected as radio sources (radio pulsars) or, when they accrete matter coming fr ...
... The compact remnants of massive stars A neutron star is the compact remnant of a massive star (M ≥ 8 MA) with a central density that can be as high as 5 to 10 times the density of an atomic nucleus. Neutron stars can be detected as radio sources (radio pulsars) or, when they accrete matter coming fr ...
1. The distances to the most remote galaxies can be
... 43. The redshift of galaxies in the Universe is correctly interpreted as: a) A Doppler shift due to the motions of the galaxies through space. b) An “aging” of the light. c) Space itself is expanding with time; the wavelengths of photons are stretched while they travel ...
... 43. The redshift of galaxies in the Universe is correctly interpreted as: a) A Doppler shift due to the motions of the galaxies through space. b) An “aging” of the light. c) Space itself is expanding with time; the wavelengths of photons are stretched while they travel ...
The Death of High Mass Stars
... Stars form out of clouds of gas and dust (which can be several hundred light years across) in our Galaxy (the Interstellar Medium stuff between the stars). The atoms and molecules in these clouds are moving with speeds according to the temperature of the cloud. If the cloud is cold enough, the parti ...
... Stars form out of clouds of gas and dust (which can be several hundred light years across) in our Galaxy (the Interstellar Medium stuff between the stars). The atoms and molecules in these clouds are moving with speeds according to the temperature of the cloud. If the cloud is cold enough, the parti ...
High energy universe – Satellite missions
... Keywords. Gamma ray astronomy; x-ray astronomy; satellite missions; active galactic nuclei; gamma ray bursts. PACS Nos 98.54.A; 98.70.Lt; 98.70.Qy; 98.70.Rz ...
... Keywords. Gamma ray astronomy; x-ray astronomy; satellite missions; active galactic nuclei; gamma ray bursts. PACS Nos 98.54.A; 98.70.Lt; 98.70.Qy; 98.70.Rz ...
Presentation available here - Lunar and Planetary Institute
... All core collapse explosions are asymmetric, maybe produced by magnetic jets. How can this be proved? Gamma-ray bursts are caused by jets of material moving at nearly the speed of light. Do they mark the birth of black holes? At least some gamma-ray bursts (and maybe all) arise in supernova ex ...
... All core collapse explosions are asymmetric, maybe produced by magnetic jets. How can this be proved? Gamma-ray bursts are caused by jets of material moving at nearly the speed of light. Do they mark the birth of black holes? At least some gamma-ray bursts (and maybe all) arise in supernova ex ...
Slide 1 - Arif Solmaz
... Distance measurements of some gamma bursts show them to be very far away—2 billion parsecs for the first one measured. Occasionally the spectrum of a burst can be measured, allowing distance determination: ...
... Distance measurements of some gamma bursts show them to be very far away—2 billion parsecs for the first one measured. Occasionally the spectrum of a burst can be measured, allowing distance determination: ...
Neutron star - SharpSchool
... The temperature of a supernova can reach 1,000,000,000 °C Stephen Hawking - Supernova ...
... The temperature of a supernova can reach 1,000,000,000 °C Stephen Hawking - Supernova ...
astr study guide ex 3 s`16
... 32. Why would an isolated black hole in empty intergalactic space be difficult to detect? 33. The material that accretes onto a neutron star or black hole is expected to emit X-rays because 34. What is the difference between a neutron star and a pulsar? 35. What determines the escape velocity of an ...
... 32. Why would an isolated black hole in empty intergalactic space be difficult to detect? 33. The material that accretes onto a neutron star or black hole is expected to emit X-rays because 34. What is the difference between a neutron star and a pulsar? 35. What determines the escape velocity of an ...
HE and VHE emission from X-ray binaries
... Marginal detections occur at lower phases. We need more observation time at periastron passage Parts of the orbit not covered due to similarities between orbital period (26.5 days) and Moon period ...
... Marginal detections occur at lower phases. We need more observation time at periastron passage Parts of the orbit not covered due to similarities between orbital period (26.5 days) and Moon period ...
Astrophysical X-ray source
Astrophysical X-ray sources are astronomical objects with physical properties which result in the emission of X-rays.There are a number of types of astrophysical objects which emit X-rays, from galaxy clusters, through black holes in active galactic nuclei (AGN) to galactic objects such as supernova remnants, stars, and binary stars containing a white dwarf (cataclysmic variable stars and super soft X-ray sources), neutron star or black hole (X-ray binaries). Some solar system bodies emit X-rays, the most notable being the Moon, although most of the X-ray brightness of the Moon arises from reflected solar X-rays. A combination of many unresolved X-ray sources is thought to produce the observed X-ray background. The X-ray continuum can arise from bremsstrahlung, either magnetic or ordinary Coulomb, black-body radiation, synchrotron radiation, inverse Compton scattering of lower-energy photons be relativistic electrons, knock-on collisions of fast protons with atomic electrons, and atomic recombination, with or without additional electron transitions.Furthermore, celestial entities in space are discussed as celestial X-ray sources. The origin of all observed astronomical X-ray sources is in, near to, or associated with a coronal cloud or gas at coronal cloud temperatures for however long or brief a period.